Pros: free, easy to use, customizable, programs are easily installed and updated automatically, easy to dual boot with a windows system (extra effort needed for Macs, but not too much), really easy to use for basic usage
Cons: windows software is not supported (like games) but many windows applications can be run with WINE; when it comes to linux, there's sort of a pit in the learning curve between those who are novice users who just just an OS's built in functionality, and those who highly enjoy customizing every aspect of their OS - if you fit in between those two as a user who highly enjoys customization but isn't that adept with computers (example: a novice user trying to get windows games to work), you can mess up and have to reinstall the OS because you yourself won't know how to fix what you did.
Overall, if you don't rely on specific programs, Linux is a fantastic OS and very much worth it.
Ubuntu with Gimp (a powerful image editor) open
Ubuntu comes with some of the sickest transitions (this is transitioning from one workplace to another, think of workplaces as extra desktops)
I personally recommend linux mint, which is Ubuntu with extra drivers and codecs and stuff which Ubuntu doesn't include because they aren't open source